178 



POWER-HOUSE DESIGN 



FIG. 91. Interior View of Generating Station, Connecticut Power Company, 

 Falls River Development. 



the floor above the repair room so as to enable the transformer 

 core to be lifted out of the tank, or a pit may be provided into 

 which the transformer may be lowered so that sufficient head- 

 room is obtained for lifting out the core. Sometimes the repair 

 room is so situated that the main crane cannot be utilized for 

 dismantling the units. In such a case a chainfall supported from 

 a heavy I-beam in the floor above may be provided. This, how- 

 ever, as a rule, only refers to smaller plants. 



The oil tanks should be located in the basement, and par- 

 ticular care should be taken to avoid any fire risk. For this 

 reason it is advisable to install the tanks in separate enclosed 

 compartments and in certain cases these have been filled with 

 sand. Their location should also be such that in case of fire the 

 oil can readily be drained in the tailrace. 



Current Limiting Reactors. As these are inserted either 

 between the low-tension bus sections or in the low-tension trans- 

 former leads, their location is in the low-tension switchroom, close 



